Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e041386191b274…

MALICIOUS

PDF

64.8 KB Created: 2020-08-14 21:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c52eed8ab20322074c64ecc9fc045c49 SHA-1: 3ce59d616215bf5cfda85f933eae52ef4cf6477f SHA-256: a0e041386191b274f42083aa07f26e1606ea3a1f759284f9693ad2509a19748f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains a critical redirector link to ttraff.com. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs pointing to cdn.shopify.com. The document body contains garbled text but includes the malicious URL, suggesting an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=barsat+film+video+song+free
    • http://files.ohbot.co.uk/uploads/1/3/1/1/131164153/9a5278c63.pdf
    • http://files.therealcomputerdoctor4u.com/uploads/1/3/1/6/131606630/gebemewumugorob.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/c_sort_vector.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/64698328533.pdf
    • https://cdn.shopify.com/s/files/1/0447/5568/1431/files/vocational_interest_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdf
    • https://cdn.shopify.com/s/files/1/0438/3608/0285/files/worafatibulexisuradixijar.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3423/files/13416671519.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/zewiroriteperizetixodamok.pdf
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/lieenie_akier.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/52099872395.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/voltage_regulator_circuit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a713.bin
30758348d76267e3312207cd7f3e45ec85f431ec0b4b07c01610d53b9e572451
pdf-font-stream PDF embedded font (sfnt) at offset 0xA713 5124 bytes
font_01_sfnt_off0000b868.bin
74661a8f64dd4a8b74aa1fb886b2c52691f001d94c0bd60186a92d17984cb33d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB868 15488 bytes
font_02_sfnt_off0000e8be.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BE 4324 bytes